I mounted some rectangular Hellas under the bumper on a 300TD. It looks better suited in my opinion, than round lamps on the W123 (sorta stealthy).
The 115 chassis has a nice littel cut out to either side of the grill that is perfect for mounting up to 6 inch lights. I have a set of Carellos I need to install on my 220.
(picture of the wagon lights to follow)

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!